2cc10f5b85
config/ * picflag.m4: Merge from GCC. * dfp.m4: Ditto. * bootstrap-asan.mk: Ditto. * ChangeLog: Ditto.
94 lines
2.3 KiB
Text
94 lines
2.3 KiB
Text
# _GCC_PICFLAG(FLAG, DISPATCH)
|
|
# ----------------------------
|
|
# Store PIC flag corresponding to DISPATCH triplet in FLAG.
|
|
# Explit use of -fpic in CFLAGS corresponding to FLAG overrides default.
|
|
AC_DEFUN([_GCC_PICFLAG], [
|
|
|
|
case "${$2}" in
|
|
# PIC is the default on some targets or must not be used.
|
|
*-*-darwin*)
|
|
# PIC is the default on this platform
|
|
# Common symbols not allowed in MH_DYLIB files
|
|
$1=-fno-common
|
|
;;
|
|
alpha*-dec-osf5*)
|
|
# PIC is the default.
|
|
;;
|
|
hppa*64*-*-hpux*)
|
|
# PIC is the default for 64-bit PA HP-UX.
|
|
;;
|
|
i[[34567]]86-*-cygwin* | x86_64-*-cygwin*)
|
|
;;
|
|
i[[34567]]86-*-mingw* | x86_64-*-mingw*)
|
|
;;
|
|
i[[34567]]86-*-interix[[3-9]]*)
|
|
# Interix 3.x gcc -fpic/-fPIC options generate broken code.
|
|
# Instead, we relocate shared libraries at runtime.
|
|
;;
|
|
i[[34567]]86-*-nto-qnx*)
|
|
# QNX uses GNU C++, but need to define -shared option too, otherwise
|
|
# it will coredump.
|
|
$1='-fPIC -shared'
|
|
;;
|
|
i[[34567]]86-pc-msdosdjgpp*)
|
|
# DJGPP does not support shared libraries at all.
|
|
;;
|
|
ia64*-*-hpux*)
|
|
# On IA64 HP-UX, PIC is the default but the pic flag
|
|
# sets the default TLS model and affects inlining.
|
|
$1=-fPIC
|
|
;;
|
|
mips-sgi-irix6*)
|
|
# PIC is the default.
|
|
;;
|
|
rs6000-ibm-aix* | powerpc-ibm-aix*)
|
|
# All AIX code is PIC.
|
|
;;
|
|
|
|
# Some targets support both -fPIC and -fpic, but prefer the latter.
|
|
# FIXME: Why?
|
|
i[[34567]]86-*-* | x86_64-*-*)
|
|
$1=-fpic
|
|
;;
|
|
m68k-*-*)
|
|
$1=-fpic
|
|
;;
|
|
# FIXME: Override -fPIC default in libgcc only?
|
|
sh-*-linux* | sh[[2346lbe]]*-*-linux*)
|
|
$1=-fpic
|
|
;;
|
|
# FIXME: Simplify to sh*-*-netbsd*?
|
|
sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \
|
|
sh64-*-netbsd* | sh64l*-*-netbsd*)
|
|
$1=-fpic
|
|
;;
|
|
# Default to -fPIC unless specified otherwise.
|
|
*)
|
|
$1=-fPIC
|
|
;;
|
|
esac
|
|
|
|
# If the user explicitly uses -fpic/-fPIC, keep that.
|
|
case "${m4_bpatsubsts($1, PICFLAG, CFLAGS)}" in
|
|
*-fpic*)
|
|
$1=-fpic
|
|
;;
|
|
*-fPIC*)
|
|
$1=-fPIC
|
|
;;
|
|
esac
|
|
])
|
|
|
|
# GCC_PICFLAG
|
|
# -----------
|
|
# Store host PIC flag in PICFLAG.
|
|
AC_DEFUN([GCC_PICFLAG], [
|
|
AC_REQUIRE([AC_CANONICAL_HOST])
|
|
_GCC_PICFLAG([PICFLAG], [host])])
|
|
|
|
# GCC_PICFLAG_FOR_TARGET
|
|
# ----------------------
|
|
# Store target PIC flag in PICFLAG_FOR_TARGET.
|
|
AC_DEFUN([GCC_PICFLAG_FOR_TARGET], [
|
|
AC_REQUIRE([AC_CANONICAL_TARGET])
|
|
_GCC_PICFLAG([PICFLAG_FOR_TARGET], [target])])
|